Probability Basics
Practice problems on fundamental probability concepts including dice, cards, balls, and real-world scenarios
Questions
When two dice are thrown, the probability of getting a number always greater than 4 on the second dice is.
- 1/6
- 1/3
- 1/36
- 5/36
A die is thrown once. What is the probability of getting the numbers 3 and 4?
- 1/3
- 2/3
- 0
- 1
Two dice are thrown simultaneously. The probability of getting a multiple of 2 on one die and a multiple of 3 on the other is________.
- 5/36
- 5/12
- 11/36
- 1/12
In a single throw of a die, the probability of getting a multiple of 3 is _______.
- 1/2
- 1/3
- 1/6
- 3/4
A bag contains 12 balls of two different colors, out of which x are white. One ball is drawn at random. If 6 more white balls areput in the bag, the probability of drawing a white ball now will be double that of the previous probability of drawing a white ball. Then, the value of x is _____.
- 3
- 4
- 5
- 6
Cards marked with the numbers 3, 4, 5 , ………, 50 are placed in a box and mixed thoroughly. One card is drawn at random from the box. The probability that number on the drawn card is a number which is a perfect square is ______.
- 6/47
- 7/47
- 6/48
- 7/48
A bag contains 6 blue and 4 green marbles. If a marble is drawn at random from the bag, the probability that the marble drawn is not green, is
- 2/5
- 1/5
- 4/5
- None of these
A card is drawn from a packet of 100 cards numbered 1 to 100. The probability of drawing a number which is a cube is _____.
- 1/10
- 9/100
- 1/20
- 1/25
One card is drawn from a well-shuffled deck of 55 cards. The probability of drawing an ace is ______.
- 1/12
- 1/13
- 1/50
- none of these
The probability for a leap year to have 53 Sundays is ________.
- 1/366
- 1/52
- 2/7
- 1/7
Ram and sham are friends. The probability that both will have the same birth day is
- none of these
- 2/365
- 1/365
- 364/365
1000 tickets of a lottery were sold and there are 5 prizes on these tickets. If Ruche purchased one lottery ticket, the probability of winning prize is _______.
- 1/200
- 1/100
- 1/300
- 1/400
A letter of English alphabets is chosen at random. The probability that the letter chosen is a consonant is
- 5/26
- . 21/26
- 22/6
- 1/26
Two dice are thrown at a time. The probability that the difference of the numbers shown on the dice is 1 is _____
- 5/18
- 1/36
- 1/6
- 1/18
Cards marked with numbers 1, 2, 3, ……….., 25 are placed in a box and mixed thoroughly and one card is drawnat random from the box. The probability that the number on the card is a multiple of 3 or 5 is
- 13/25
- 12/25
- 8/25
- 3/5
Two dice are thrown simultaneously. The probability of getting a doublet or a total of 4 is ______.
- 2/9
- 3/7
- 4/9
- 5/9
A bag contains three green, four blue and two orange marbles. If a marble is picked at random, then the probability that it is not an orange marble, is _____.
- 1/4
- 1/3
- 4/9
- 7/9
The king, queen and jack of clubs are removed from a deck of 52 playing cards and then well-shuffled. One card is selected from the remaining cards. The probability of getting a club is _______.
- 13/19
- 10/49
- 3/49
- 1/49
Three letters, to each of which corresponds an addressed envelope are placed in the envelopes at random. The probability that all letters are placed in the right envelopes is ______.
- 1/3
- 1
- 1/6
- 0
From a normal pack of cards, a card is drawn at random. The probability of getting a jack or a king is _______.
- 2/52
- 1/52
- 2/13
- 5/13